Slugs Or Snails

We apologize for not getting back to you sooner. We are bit perplexed by your basil leaves. We assume you have looked at the back of affected leaves and didn’t see a pest to identify. Also consider that this could be the result of herbicide or pesticide drift from treating another plant nearby. We noticed a chewed leaf in the background. This may be the work of slugs or snails. Look for slime trails to confirm. An iron phosphate slug bait is pretty safe and does as good a job as the more toxic baits. Very early in the morning or at dusk when the garden has been watered, the beasties come out and can be identified and dealt with. The best hunting for slugs and snails is just a bit after dawn. Your basil looks rather pale and we wonder if it is getting enough sun.